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Would like to avoid using single location iteration of a website that gives time of sunset each date for locations.

I want to be able to produce a chart or info-graphic for publishing on a website as a guide for participants stretching from nyc,through Lebanon KS,to San Francisco.

A great circle path with formula or algorithm to produce the table or graph???

interval of time would be June to November only

Greg - Traacker -
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  • Great question and there are a couple of ways to go on this. There can be answers that cite books with astronomical algorithms that you can put in a spreadsheet for example, and even simple computer programs. Do you have any experience using some simple Python or have access to someone who can assist you running a Python script? – uhoh Jun 12 '20 at 23:33
  • I won't be able to post a Python-based answer soon, but there's this: https://rhodesmill.org/skyfield/almanac.html look for the almanac.sunrise_sunset() method – uhoh Jun 13 '20 at 15:25
  • I shall research this idea. No python experience but a willing student. – Greg - Traacker - Jun 14 '20 at 02:19
  • Skyfield apparent is program that does this kind of calculation? How daunting a task is that for a complete newbie to install and tinker? Looks pretty overwhelming. Thx for the lead... – Greg - Traacker - Jun 14 '20 at 02:26
  • I can post a short script that you can run in the next day or so and I'm happy to do so! All you'd need to do is run it. It means either installing Python on a computer or finding someone who can run it for you. – uhoh Jun 14 '20 at 02:30
  • Sweet! I owe you. Pass it forward my task now, me thinks. I have learned much about the overwhelming and "over my head". Sorry, pun to much to resist. – Greg - Traacker - Jun 15 '20 at 12:12
  • I think that means yes, so I will – uhoh Jun 15 '20 at 12:14
  • YES! Greedy perhaps but across a continent of North America, specifically 48 contiguous states with Lebanon KS as the mid point of east/west grand circle nyc(or similar east coast point DC?) & San Francisco or similar west coast... but happy for anything. Thx again. – Greg - Traacker - Jun 15 '20 at 12:20

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